1796: Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because
(a) barium allows X-rays to pass through the stomach on account of its transparency to X-rays
(b) barium compound, like magnesium sulphate helps in cleaning the stomach before X-ray examination
(c) barium is a good absorber of X-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture
(d) barium salts are white in colour and this helps the stomach to appear clearly in contrast with other regions in the picture
1797: The Constitution of India recognises
(a) only religious minorities
(b) only linguistic minorities
(c) religious and linguistic minorities
(d) religious, linguistic and ethnic minorities
1798: Match List I (Naturally occurring substances) with List II (Elements) and select the correct answer using the codes given below the Lists:
List I
I. Diamond
II. Marble
III. Sand
IV. Ruby
List II
(A) Calcium
(B) Silicon
(C) Aluminium
(D) Carbon
Codes:
(a) I-C, II-A, III-B, IV-D
(b) I-D, II-B, III-A, IV-C
(c) I-B, II-A, III-C, IV-D
(d) I-D, II-A, III-B, IV-C
1799: Match items in the List-I with List-II and select the correct answer using the codes given below the lists:
List I (Power Station)
(A) Kothagudem
(B) Raichur
(C) Mettur
(D) Wanakbori
List II (State)
1. Andhra Pradesh
2. Gujarat
3. Karnataka
4. Tamil Nadu
(a) 1 2 4 3
(b) 4 3 1 2
(c) 4 2 1 3
(d) 1 3 4 2
1800: Zero was invented by
(a) Aryabhata
(b) Varahamihira
(c) Bhaskara I
(d) an unknown Indian